How often should I clean and re-oil this filter?

The cleaning interval depends on your driving conditions. Inspect the filter regularly, and clean it when you see a buildup of dirt and debris. K&N sells filter cleaning and oiling kits specifically for this purpose.

Does this filter come pre-oiled?

Yes, this K&N filter comes pre-oiled from the factory, ready for installation. You don't need to oil it before its first use. Just clamp it on and go.

What is the flange inner diameter?

The flange inner diameter is 4 inches. The pliable rubber allows some stretch, up to 1/16 of an inch (1.5mm), to accommodate slightly larger intake tubes.

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Est. 1957

K&N Universal Clamp-On Air Filter 4in FLG / 6in B / 4in T / 7in H

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Specifications

Brand: K&N
Part #: RU-4680
UPC: 024844373816

K&N Universal Clamp-On Air Filter 4in FLG / 6in B / 4in T / 7in H

Name: K&N Universal Clamp-On Air Filter 4in FLG / 6in B / 4in T / 7in H
Brand: K&N
Price: 78.99 USD
Availability: InStock

$78.99

Only 7 left in stock

Universal clamp-on air filter for racing, generators, tractors, and more. Washable and reusable.

Key Features

Universal fit — works in many applications
Pliable rubber flange — allows secure attachment
Flange stretches up to 1/16 inch — fits in-between sizes
Washable and reusable — clean and re-oil for long life

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 of an inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.